What does the period of elements on a periodic tabl show you in terms of electronic stucture?
Answer:
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f 5g
6s 6p 6d 6f 6g 6h
7s 7p 7d 7f 7g 7h 7i
Draw diagonals upper right to lower left,
1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d... and there is your ordering by orbital angular momentum. Or read it off the Periodic Table.
Its period (horizontal row) shows how many of its electron orbitals are occupied. If it's in the first period, then only its first orbital has electrons in. If it's in the second, then its second orbital also has electrons in and so on down the table. Its group (vertical column) shows how many electrons there are in an element's outer electron orbital.
I'm pretty sure that the different periods or rows of the periodic table are set up to show the relationship of the atomic number (the # of protons) of the atoms from 1-102 Hydrogen to Nobelium, not the electron structure. The electron structure corresponds to the # of protons in a stable atom.
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